21684740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{14081}}^1$

素因数の和:14108

約数の個数: 48

約数和(自身を含む): 56778624

約数和(自身を除く): 35093884

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 14081, 28162, 56324, 70405, 98567, 140810, 154891, 197134, 281620, 309782, 394268, 492835, 619564, 774455, 985670, 1084237, 1548910, 1971340, 2168474, 3097820, 4336948, 5421185, 10842370, 21684740]

約数ペア:

[(1, 21684740), (2, 10842370), (4, 5421185), (5, 4336948), (7, 3097820), (10, 2168474), (11, 1971340), (14, 1548910), (20, 1084237), (22, 985670), (28, 774455), (35, 619564), (44, 492835), (55, 394268), (70, 309782), (77, 281620), (110, 197134), (140, 154891), (154, 140810), (220, 98567), (308, 70405), (385, 56324), (770, 28162), (1540, 14081)]